Building Paper 1m x 25m

This Grade A1F Standard Building Paper can be used as an underlay for lead sheet and is ideal for use on smooth substrates, such as plywood if its underside is ventilated. It is also compatible with natural stone materials. When utilised on smooth concrete or screed surfaces, it inhibits the free alkali released by drying cement from attacking the lead sheeting. Conforms to BS1521 Class A.